

   TTwwoo--DDiimmeennssiioonnaall KKeerrnneell DDeennssiittyy EEssttiimmaattiioonn

        kde2d(x, y, h, n=25, lims=c(range(x), range(y)))

   AArrgguummeennttss::

          x: x coordinate of data

          y: y coordinate of data

          h: vector of bandwidths for x and y directions.
             Defaults to normal reference bandwidth.

          n: Number of grid points in each direction.

       lims: The limits of the rectangle covered by the grid as
             `c(xl, xu, yl, yu)'.

   DDeessccrriippttiioonn::

        Two-dimensional kernel density estimation with an axis-
        aligned bivariate normal kernel, evaluated on a square
        grid.

   VVaalluuee::

        A list of three components.

         x,: The x and y coordinates of the grid points, vec-
             tors of length `n'.

          z: An `n'  x  `n' matrix of the evaluated density.

